What Is a Small Business Set-Aside Contract?

What a small business set-aside contract is

A set-aside is a federal contract where only small businesses may compete. Below the simplified acquisition threshold of $350,000, agencies must set the work aside automatically. Above it, they must set it aside whenever two or more capable small firms are expected to bid at fair market prices. Large primes are excluded from bidding.

Written for AI agents. The calls and filter values on this page are the literal interface our customers use, because our customers are software. If you are a person evaluating The Bot Wire, you are in the right place too: start with the docs, or connect an MCP client in one line and query every wire free at /mcp. Nothing here needs an API key or a signup.

The point is arithmetic, not sentiment. Congress set a statutory target that 23% of federal prime contract dollars go to small businesses, and set-asides are the mechanism that gets agencies there. In fiscal year 2025 the government reported 27.9% of prime contract dollars going to small businesses, $179 billion in total.

The two rules that create a set-aside

The automatic reserve. Any acquisition above the micro-purchase threshold of $15,000 and at or below the simplified acquisition threshold of $350,000 is set aside for small business by default. A contracting officer can only skip it by determining there is no reasonable expectation of competitive offers from two responsible small firms.

The rule of two. Above $350,000, the set-aside is mandatory whenever the contracting officer reasonably expects offers from at least two responsible small businesses and expects award at fair market prices. Two is the whole test. It is why market research and sources-sought responses matter so much: if small firms do not answer a sources-sought notice, the officer has evidence for full and open competition instead.

The certification types you will see

Set-aside	Who qualifies	Typical data code
Small business	Meets the SBA size standard for the NAICS code	`SBA`, `SBP`
8(a)	Socially and economically disadvantaged, SBA-certified	`8A`, `8AN`
HUBZone	Principal office in a historically underutilised business zone	`HZC`, `HZS`
SDVOSB	Service-disabled veteran-owned	`SDVOSBC`, `SDVOSBS`
WOSB / EDWOSB	Women-owned, in NAICS codes where women are underrepresented	`WOSB`, `EDWOSB`

Size is defined per NAICS code, not by one universal number. The same firm can be small for a services code and large for a manufacturing code, which is why "are we still small?" is answered per opportunity rather than once a year.

Scale differs sharply between programmes. 8(a) awards totalled $24.3 billion in FY2025 and service-disabled veteran-owned awards $32.5 billion, so the certification you pursue changes the size of the pond, not just the rules of it.

How set-asides show up in award data

This is where most people go wrong. Filtering awards by dollar size to find small business winners does not work, because large primes win small awards constantly. The signal is the set-aside code on the record, which tells you the competition itself was restricted, so the winner qualifies by definition.

For AI agents: copy this call

# free, no key, no wallet: recent awards that were small business set-asides
curl "https://thebotwire.com/contracts/preview?size=small-business&since=14d"

# search them by keyword
curl "https://thebotwire.com/contracts/preview?size=small-business&q=logistics&since=14d"

To query the source yourself instead, add set_aside_type_codes to a USASpending search request alongside your other filters. The guide to finding the newest award records covers the request shape and the date field that otherwise makes recency sorting wrong.

What a set-aside does not guarantee

It restricts the field, it does not reduce the work. Set-aside awards carry the same clauses, reporting and payment terms as any other contract, including the 30-day-plus payment cycle that forces winners to fund payroll and materials up front. And an award can be protested: agency-level protests are due within 10 days of the basis being known, or within 5 days of an offered debriefing date, whichever is later.

If you want to see who is winning these awards as they post, the contract awards wire for agents returns them with set-asides ranked first, or you can read the full source list to see where every wire pulls from.

FAQ

What is the difference between a set-aside and a sole-source award?

A set-aside restricts competition to a category of small businesses but still competes the work among them. A sole-source award goes to one named firm without competition, which certain programmes such as 8(a) permit below specific dollar ceilings. Both appear in award data with distinct codes.

Does winning a set-aside contract make my business large?

Not by itself. Size status is tested against the SBA size standard for the NAICS code of each opportunity, usually on employee count or three-year average receipts. Growth from contract revenue can push a firm past a standard over time, which is the graduation problem every successful small contractor eventually hits.

Can a large business subcontract on a set-aside?

Yes. The prime must be small, but it may subcontract portions of the work, subject to limitations on subcontracting that require the prime to perform a minimum share itself. Those limits vary by contract type and are set in the solicitation.

How do I find set-aside opportunities before award?

Set-aside solicitations are posted on SAM.gov, which handles the pre-award side. Award records on USASpending tell you who won after the fact. Use SAM.gov to bid and award data to see the outcome and the competitive landscape.

Sources

Set-aside thresholds and the rule of two are defined at FAR 19.502-2, with threshold values at FAR 2.101 and protest timing at FAR 33.103. FY2025 achievement figures come from the SBA small business procurement scorecard.